e_example1.vhd

书籍以及一些资料 还有些源程序 这是vhde相当珍贵的教材

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity E_example1 is
port(u: in std_logic_vector(2 downto 0) ;
     v: in std_logic_vector(2 downto 0) ;
     w: in std_logic_vector(2 downto 0) ;
     x: in std_logic_vector(2 downto 0) ;
     y: in std_logic_vector(2 downto 0) ;
     s: in std_logic_vector(2 downto 0) ;
     Display : OUT STD_logic_vector(0 TO 6)
);
end E_example1;
 
ARCHITECTURE Behavior OF E_example1 IS
signal outa: std_logic_vector(2 downto 0);


COMPONENT E_multiplexer IS
port (u0 : in std_logic ;
      u1 : in std_logic ;
      u2 : in std_logic ;
      v0 : in std_logic ;
      v1 : in std_logic ;
      v2 : in std_logic ;
      w0 : in std_logic ;
      w1 : in std_logic ;
      w2 : in std_logic ;
      x0 : in std_logic ;
      x1 : in std_logic ;
      x2 : in std_logic ;
      y0 : in std_logic ;
      y1 : in std_logic ;
      y2 : in std_logic ;
      s0 : in std_logic ;
      s1 : in std_logic ;
      s2 : in std_logic ;
      m0 : buffer std_logic; 
      m1 : buffer std_logic;
      m2 : buffer std_logic
      );
END COMPONENT;


COMPONENT E_7_seg IS
PORT ( C : IN STD_logic_vector(2 DOWNTO 0);
       Display : OUT STD_logic_vector(0 TO 6));
END COMPONENT;


BEGIN
u8: E_multiplexer PORT MAP(u(0),u(1),u(2),v(0),v(1),v(2),w(0),w(1),w(2),x(0),
x(1),x(2),y(0),y(1),y(2),s(0),s(1),s(2),outa(0),outa(1),outa(2));

u9: E_7_seg port map(outa,display);

end Behavior;